This status comes via the importer Merchant du Vin, who says:
"All our beers [are vegan]. (Filtering is usually done at breweries with DE or synthetic media in a plate filter; fining is the process of clarifying beer by adding an ingredient - like egg whites, gelatin, or isinglass - that causes proteins and other haze to settle out in a conditioning vessel.)"

Double check:

The beer is brewed after the strict Bavarian Purity Law, the oldest law for alimentary products. This means the beer contains only malted barley, water, hops and yeast. Water is tertiary water from our own deep well, the barley is from fields of our area around Aying, hops comes from Holledau/Hallertau - also in Bavaria and yeast is produced from our own pure cell yeast cultures for bottom fermentation.